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Discussion Starter #1
Here goes. my fj40 stopped charging all of a sudden. The amp gauge would show draw but never charge. I got a new alt and new reg and the problem has not gone away. Could it be the gauge even though it seems to work? When at idel or when I rev the engine the lights stay the same where they use to get brighter when I would rev the engine. Any help would be great!! Thanks in advance. Scott
 

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Discussion Starter #2
ok, can anyone tell me how to test the amp gauge?
 

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try a voltage gauge, or voltmeter on the battery... 13.5v+, you're good to go.
 

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I realize that you said that the gauge doesn't show a charge but try this anyway. Get (or take if you already have one) a digital volt meter and see what is across the battery when the vehicle is running. You should show14+ Volts with noting running, like lights and or blower.
 
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